From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The recommendation of winter oils for Phantom III cars.
| Identifier | ExFiles\Box 145\3\ scan0068 | |
| Date | 27th November 1936 | |
| 1235. W/LH.{Mr Haworth} from Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}5/R.27.11.36. We think that all P.III cars which are at present being delivered to customers, during the winter months should be filled with one of the winter oils which we recommend in the Instruction Book. We have not gone sufficiently far with our tests on the extremely thin oil, such as Mobil-arctic, to be able to recommend it for universal use, though, as we have previously pointed out in a Depot Sheet, it is really necessary on a P.III in extreme cases where a customer wishes to leave his car outside, or in an un-heated garage. Rm.{William Robotham - Chief Engineer} | ||